Finding the Fourth Proportional to 1,123.56, 1,683 and 1,083.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.56 : 1,683 = 1,083.24 : x
2. Step 2: Convert to fraction form
   1,123.56/1,683 = 1,083.24/x
3. Step 3: Cross multiply
   1,123.56x = 1,683 × 1,083.24
4. Step 4: Simplify right side
   1,123.56x = 1,823,092.92
5. Step 5: Solve for x
   x = 1,823,092.92/1,123.56
6. Step 6: Final answer
   x = 1,622.60